Update borg pattern to reflect discussion in issue#3

[modasserbillah]

Problem

The Borg pattern should not change state on new instance creation unless explicitly changed. Currently all new instances change the state to Init.

Solution

Update the pattern to reflect how it should behave. The Borg class should be subclassed and used. State should only change if explicitly changed.

Updated the docstring slightly to reflect the update.

Reference

• https://learning.oreilly.com/library/view/python-cookbook/0596001673/ch05s23.html
• http://www.aleax.it/5ep.html

Related Issue

• Is Borg really implemented right ? #3